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參數(shù)資料
| 型號(hào)： | TEA1007 |
| 英文描述： | D52 - BACKSHELL ENVIRON EMI-RFI STRT MIL |
| 中文描述： | 簡(jiǎn)單相位控制電路 |
| 文件頁(yè)數(shù)： | 6/8頁(yè) |
| 文件大?。?/td> | 124K |
| 代理商： | TEA1007 |
AdroncComponentsGmbH
TEA1007
TELEFUNKEN Semiconductors
Rev. A1, 28-May-96
6 (8)
The timing switch using the TEA 1007permits two-phase
operation of loads with conduction angle adjustable as
required (see figure 6).
Phase 1:
=
max
Period t = 5 to 320 sec
adjustable with R
21
adjustable with R
22
Phase 2:
=
Period t = optional, or up to the pressed time of switch S
min
adjustable with R
20
Phase 1 begins as soon as the mains voltage is applied.
The maximum angle of conduction
max
can be adjusted
by means of R
21
. The timing circuit comprises T
1
, T
2
, Z
1
,
C
3
and R
22
. As the voltage to which C
3
is charged
increases, the current through Z
1
decreases. When the
potential at the emitter of T
2
has climbed so high that the
current through Z
1
becomes zero, T
1
can no longer
conduct. The potential on R
21
therefore drops. The
conduction angle
decreases to the value
adjustable by means of R
20
(Phase 2).
The transition from
max
to
following the adjustment of R
22
and takes ca. 2 to 20secs.
The time constant of Phase 1
,
which is also determined by
R
22
, begins with the release of key S. If S is pressed again
before the end of the time constant, a period equal to the
complete time-constant is added to the time already run.
min
,
min
takes place continuously
The circuit is powered direct from mains via D
1
and R
1
in
every negative half-cycle. C
1
smooths the operating
voltage which settles at a level of ca. 15.5 V.
Figure 7. Fading circuit for manual operation
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